I see a lot about source codes being leaked and I’m wondering how it that you could make something like an exact replica of Super Mario Bros without the source code or how you can’t take the finished product and run it back through the compilation software?
Code can be decompiled into code that can be recompiled, but compilers translate the human readable code into code that is easier to understand for machines. So decompiled code often ends up being nearly undecipherable for humans, and can take a long time to try and decipher.